<!DOCTYPE html>
<html>

<head>
  <meta charset="utf-8">
  <link rel="stylesheet" href="https://fonts.googleapis.com/css?family=Noto+Sans+SC:100,300,400,500,700,900">
  <title>智慧笔记</title>
  <style>
    @media screen and (min-width:1440px) {
      body {
        /* background-color: lightpink; */
        text-align: center;
        margin: 0;
      }

      div {
        width: 1440px;
        height: 300px;
        /* height: auto; */
        margin: 0 auto;
        /* background-color: lightskyblue; */
      }
    }

    @media screen and (max-width: 1440px) {
      body {
        /* background-color: lightblue; */
        margin: 0;
      }

      div {
        width: 1440px;
        height: 300px;
        /* background-color: lightpink; */
      }
    }
  </style>
</head>

<body>
  <div id="app"></div>
</body>
<script>
</script>

</html>